Patent · US Expired

Interpolation filter and method for digitally interpolating a digital signal

US7225213B2 · kind B2 · utility

2Cited by
7References
18Claims
0Family size

Assignee

Inventor

Key dates

Filing dateJul 2, 2001
Grant dateMay 29, 2007
Priority date
Expiry dateMar 21, 2024

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH03H17/0664
  • WIPO fieldBasic communication processes
  • WIPO sectorElectrical engineering

Abstract

The invention relates to an interpolation filter and to a method for filtering a digital input signal. The interpolation filter has an amplitude characteristic with a low-pass-shaped damping curve in the useful signal frequency range of the digital input signal. The group delay time of the interpolation filter is essentially constant in the useful signal frequency range and can be adjusted within a clock period of the equidistant digital signal.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.